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Cisco SPA504 desk phone, dark grey finish, four line keys, monochrome display, RJ-45 PoE port

Cisco Systems, Inc.

Cisco Systems, Inc. SPA504 4-line VoIP phone

SKU CH-S8J5-HBJ7Z MPN SPA504

A 4-line IP phone with Power over Ethernet and SIP v2 support for business VoIP systems

  • Product typeIP Phone
  • Four lines handle concurrent calls efficiently
  • Power over Ethernet removes separate power adapter need
  • SIP v2 protocol ensures broad VoIP compatibility
  • Caller ID displays incoming numbers instantly
  • Tested interoperability with major VoIP infrastructure

Four-line SIP desk phone

The Cisco SPA504 is a wired IP phone that handles four simultaneous lines over a single Ethernet connection. It runs SIP v2 and draws power through PoE, so no separate mains adapter is required. The handset includes caller-ID display and supports Cisco XML applications for integrated business workflows.

Office workers needing multiple extensions

Suits small-business staff who manage several direct numbers or shared lines from one desk. The four programmable line keys give quick access to each call appearance without scrolling. Buyers who need colour screens, touch controls, Wi-Fi connectivity or more than four concurrent lines should look at other models.

PoE-powered SIP v2 endpoint

The decisive specification is the single RJ-45 port that carries both data and PoE power while speaking SIP v2. If the network infrastructure supplies PoE and the PBX uses SIP v2, the phone will register and operate immediately. Without PoE switching or a SIP v2 server the handset cannot function.

How it compares

Measured against everything we stock in IP Phones & VoIP Handsets, at today’s prices. Recalculated every night.

Price $51,821.99
Pricier than about 99% of the 495 comparable items (median $138.99).

Specifications

Product
Brand nameCisco
Product typeIP Phone

Questions about this item

Is this the 4-line version or a different capacity?

This model provides four lines, as indicated by the 504 designation in the product name.

What does the four-line specification mean for daily use?

It allows you to handle four separate calls or extensions simultaneously on a single desk phone.

Which network standard does the RJ-45 port use and what does it limit?

The RJ-45 port supports Power over Ethernet, so the phone draws power and data through one cable, limited by your PoE switch budget.

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